- The most recent issue to be published was 73
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- Database last updated on Mon, 03 May 2010 14:22:52 +0100
contents of j73
March 2010
- CREG Journal 73 (1-24)
- This issue has a cover date of March 2010, but was actually published on 21 April 2010.
- Newssheet (3)
- CREG Online Journals, 2010 Cave Technology Symposium, Newsletters and Discussion Forum, Letters to the Editor, Cover Picture, Diary Dates.
- Video Camera for Probing Leads (4)
- Developed as a low cost digger’s tool, Peter Hamilton describes a simple but effective CCTV camera mounted on drain rods which is used to explore back filled passages and other interesting openings, prior to digging.
- Wet & Dry (5)
- Ruggedisation, waterproofing & constructional techniques. Column edited by Mike Bedford.
- Seam Wave Propagation and its Possible Application to Cave Radio (6-9)
- Steven M. Shope of Sandia Research Corporation discusses the physical principles of seam wave propagation that provides favourable LF propagation in geological seams. Although this is of primary application in mining where it permits tomographic imaging of coal seam anomalies, an understanding of the phenomenon may aid in selecting sites for optimum cave radio propagation.
- We Hear (10-11)
- News and events - Mike Bedford brings us the latest to impact the world of cave radio and electronics.
- A General Calibration Algorithm for 3-Axis Compass/Clinometer Devices (12-18)
- Beat Heeb describes a general algorithm for the calibration of 3-axis electronic compass/clinometer systems and gives an analysis of its properties. The algorithm he presents is fast and accurate and makes minimal assumptions about the calibration environment.
- Cave Technology Symposium 2009 (19-23)
- Mike Bedford provides an overview of the 2009 BCRA Cave Technology Symposium that was held in South Wales.
- Web Watch (24)
- Peter Ludwig conjures up another eclectic list of links, ranging from robots to nuclear batteries, including news of the latest in LED developments.
- The Adventures of GREG (24)
- Illustrations by Adrian Higgins with words by Mike Bedford.
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The CREG journal (ISSN 1361-4800) is published quarterly by the Cave Radio & Electronics Group of the British Cave Research Association. BCRA is a UK registered charity and is a constituent body of the British Caving Association, undertaking charitable activities on behalf of the BCA. CREG's aims are, by means of a regular Journal, other publications and meetings, to encourage the development and use of radio communications and other electronic and computer equipment in caving and related activities.
Annual Subscriptions are currently £8.50 (UK). The overseas rates are £10 (EU), £10 (World, surface mail) and £12.50 (World Airmail). Most back issues are still in print. For details, please contact CREG.
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